docs: def build_area_source_node(area_source):
      """
      Parses an area source to a Node class
  
      :param area_source:
          Area source as instance of :class:
          `openquake.hazardlib.source.area.AreaSource`
      :returns:
          Instance of :class:`openquake.baselib.node.Node`
      """
      # parse geometry
      source_nodes = [build_area_source_geometry(area_source)]
      # parse common distributed attributes
      source_nodes.extend(get_distributed_seismicity_source_nodes(area_source))
      return Node(
          "areaSource", get_source_attributes(area_source), nodes=source_nodes)